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""Urban Plant"" Light-Weight Solar System for Parking and other Urban Double Use Applications
F.P. Baumgartner, A. Büchel, F. Carigiet, T. Baumann, R. Epp, A. Wirtz, A. Hügeli, U. Graf
BOS, PV Carport, Mounting Structure
Subtopic: Balance of System Components
Event: 28th European Photovoltaic Solar Energy Conference and Exhibition
Session: 4CO.12.2
2897 - 2901
ISBN: 3-936338-33-7
Paper DOI: 10.4229/28thEUPVSEC2013-4CO.12.2
0,00 EUR
Document(s): paper


Innovations on all aspects of BOS and solar cell integration into the module are essential to further reducing the costs of PV electricity and substantial progress has been made in the past years. One other important aspect is the availability of space for PV power production, especially in densely occupied urban areas. Roof space is limited or only partially useable. A promising other application for PV power production in urban areas today are PV carports on parking lots, which require massive structures and foundations. The approach presented here is a newly developed PV plant which automatically stores the PV modules in a protection box in case of bad weather conditions. Avoiding bad weather conditions implies that only a fraction of the mechanical load is present on the PV modules and the structure, enabling light weight structural design. The newly developed PV plant is folding the PV generator into a protection box and will pull out the PV generator, carried on two supporting cables for operation during good weather conditions. An innovative autonomous control system was developed based on local meteo sensors and regional weather information. The PV modules of the Urban Plant are mounted six meters above a parking lot with the benefit of full double use of the land below. Thus a PV system has been built with currently 52 kW nominal power, 16 meter wide, with a folding roof of PV modules expanding 24 meters in one direction. The system can be extended to 104 kWp with a second folding roof expanding into the other direction. As special PV system design was developed with a light weight PV generator using module laminates with special mounting elements. Moreover the system comprises innovative string wiring and inverters that can be also integrated into the safety box. A first 250kW commercial system is scheduled to be set into operation in Jan 2014 in Southern Germany.